I'm just waiting for a EE smart lawyer to buy this for the sole purpose of suing the manufacturer.
Any noise should be fixed by proper power supply design the socket has nothing to do with it.
Also i opened up a Marshall amp and replaced a capacitor but I found something i didn't expect... tubes, YES TUBES!!! now the transistor was invented in the 40's made a standard in the 70's and i was born in the late 80's so this was my first time ever seeing tubes. Do tubes provide better signel quality then transistors or does this fall into the audiophool industry. because i've taken apart cheaper amps and they were all transistors. and Marshall is a well known brand
I wouldn't mind seeing a myth-busters episode about Audiophoolery